Molding-machine.



No. 888,595. PATENTBD' MAY 26, 1908.

v W. w. DOOLITTLE.

MOLDING MACHINE. v APPLIOATION FILED NOV. 14, 1906.

v 2 SHEETS-SHEET 2.

WITNESSES INVEN'I'OR UNITED STATES PATENT OFFICE WILLIAM W. DOOLITTLE,OF EVANSTON, ILLINOIS, ASSIGNOR TO CRANE COMPANY, OF CHICAGO, ILLINOIS,A CORPORATION OF ILLINOIS.

MOLDIN G-MACHINE T 0 all whom it may concern:

Be it known that 1, WILLIAM W. DOOLIT- TLE, a citizen of the UnitedStates, residing from its position of use without handling or jarring,and finally, to provide a core mold of increased simplicity andconvenience of operation. These and other objects are accomplished by myinvention, one embodiment of which is illustrated in the accompanyingdrawings, in Which Figure 1 is a plan view of the assembled mechanismFigure 2 is a side elevation thereof Figure 3 is a side elevation of thecore formed in the device;

Figure 4 is a transverse section through Figure 1, on the line IVIV;

Figure 5 is a detail section showing the core mold in the positionoccupied during filling and preliminary to the compacting of the core,and

Figure 6 isa similar section with the half molds in extreme openposition to permit of the removal of the core.

The mechanism is desi 'ned primarily for the formation and handing ofthe green sand cores used with the molds shown in my co-pendingapplication, Serial No. 329,887, of which this case is a division, andcomprises the improved mechanism to be more fully hereinafter described,whereby the cores are completely formed upon a carrier and transferredto a position on the assembling mechanism where the sectional moldsformed in the mechanism described in my co-pending application referredto are applied about the core.

The mechanism is adapted to form the core 1 shown in Figure 3 and is soarranged that when such core is formed it rests directly upon thecarrier plate for transferring to the assembling mechanism 2 to whichthe Specification of Letters Patent.

Application filed November 14, 1906.

Patented May 26, 1908.

Serial No. 343,315.

half molds have previously been transferred for the purpose ofassembling. The machine comprises in the main, two relatively movablejaws each of which is adapted to carry a half mold for forming the core,fluid pressure means for applying compressing force to these members tobring them together and connecting mechanism between the mold memberswhereby they may be widely separated in order to permit of the removalof the core, together with means-for automatically opening the members.Referring to Figures 1, 2, and 4, it will seem that the half moldmembers 44 are carried upon supporting members 5 and 6, which members 5and 6 comprise each a frame-work of two channels 7 placed back to backand pivoted to the main frame-work at the bottom thereof by means of thepivots S, and carrying at the top the cast imembers 9 and 10 to whichthe half mold members are attached. The mechanism for applying fluidpressure to the mold comprises a ram having a piston 11 secured to themember 6 and a cy inder -12 secured to the member 5 by means oftwoconnecting rods 18 extending along the sides of the mechanism and provided at one end with the transverse shaft 14 secured to the brackets 15secured to the back of the member 5. Fluid pressure is supplied by meansof a pipe 12 controlled by an ordinary three-way cock. In order that thedistance between the members 44 may be greatly increased to permit ofthe removal of the core after its formation, crank connecting meansbetween the rear side of the cylinder 12 and the connecting rods 13 "isrovided (see Figures 1 and 4), which cran; connecting means comprises atransverse shaft 16 extending through the rear part of the cylinder 12,and end portions 17 extending rearwardly and outwardly through the endsof the connecting rods 13, thus providing an eccentric mounting for theshaft 16 one of such ends being provided with an operating crank 18(Figure 2). By means of the crank or eccentric connecting means the moldmembers may be held in the position shown in Figure 4, or when the crankis moved to a position 180 from the position shown in Figure 4, suchmold members may be moved to the position shown in Figure 6, in whichposition clearance is provided so that the core may be easily removedfrom between such molding members, the

extent of movement of the members being equal to the throw of theeccentric. In order that the molding members may nor mally open to theirextended positions, I have provided the automatic weight-open atedmechanism shown in the lower portion of Figure 4. This mechanismcomprises the shaft 19 carrying the oppositely projecting arms 20, whicharms are connected by means of links 21 with the two opposing members 5and 6. The shaft 19 is normally rotated to open the members by means ofthe arm 22 provided with the weight 23. The weight of the cylinder 12may be counterbalanced by means of the arm 24 pivoted thereto andconnected to a rope running over a pulley and attached to a weight 24.The receptacle 25 is conveniently located above the machine and adaptedto discharge into the hopper 26 resting on the top of the mold members.Rotatably mounted below the mold members are a series of rollers 27,which rollers are mounted upon the sup porting brackets 28 and lead tothe assembling mechanism 2, and are adapted to carry upon their upperside the carrier plate 29, which carrier plate is adapted to slide intoa position immediately under the mold, as indicated in Figure 4, andsuch member constitutes, in this position, in effect a portion of themold as the downwardly projecting ends of the core rest directly uponthe top of the plate, so that after the core is formed, and the members44 moved to the position of Figure 6, the carrier will be free totransfer the core from its position in the mold, and no moving orhandling of the core in order to get it upon the carrier plate isnecessary. In order that the sand from the hopper may not fall clearthrough the mold when it is in the receiving position shown in Figure 5,I provide upon the under side of such mold members the projecting parts3031, which members overlap and prevent the loss of sand. If desired, asingle member might be used of sufficient length to extend across theopening when the molds are opened, but this is not desirable, as in suchcase the mold members would necessarily have to be opened unequaldistances in moving to the position of Figure 6. In order that thecarrier plate may be properly positioned under the molding members, twostops are necessary, the first of whichthe stop 32 is located at theright of the machine (see Figure 2), and is merely a projecting lugadapted to engage the carrier plate, while the other stop, 33, is aswinging one at the left hand end of the mechanism, as shown in Figures2 and 3, and is carried by the transverse shaft 34 which is normallyheld in raised position before the carrier plate by the counter-weightedlever 35. It will be apparent that this construction of core formingmechanism secures the same advantage as heretofore set forth for themold forming mechanism in the device A of my co-pending applicationreferred to, in that only a short power stroke is necessary and theadditional stroke necessary to permit of the removal of the core issecured by means of additional mechanism.

Referring now to the assembling mechanism 2 of Figures 1 and 2, it willbe noted that such mechanism comprises the removable half tables 35 and36 and the rollers 27 previously referred to. The half tables 35 and 36are movable towards and from the central rollers 27, such tables beingmounted upon a series of rollers 36 and being guided by means of atongue-and-groove engagement with the body of the frame-work, the tablesbeing provided with grooves 37 engaging corresponding tongues 38 on theframework. A stop 39 is provided at the end of each table whereby thehalf flasks may be positioned thereon, and the position of the carrierplate is positioned on the rollers 27 by means of a stop 40 againstwhich the carrier plate 29 is adapted to abut.

Starting with the parts in the position shown in Figure 4, with theexception that the piston 11 is at its extreme right hand position, andthe mold members 4 are separated as shown in Figure 5, the operation isas follows.Sand being admitted to the hopper 26, pressure is applied tothe piston 11 through the pipe 12, and the mold members are moved to theposition shown in Figure 4, thus compacting the sand in the mold andforming the core. In order to open the mold, the pipe 12 is opened tothe atmosphere, thus permitting the weights 23 acting upon the links 21to separate mold members 4 to the extent indicated in Figure 5. Thisamount of opening will not permit the mold or core 1 to be removedendwise, and in order to secure a wider opening the operating crank 18is moved to a position at 180 from that shown in Figure 4 thus openingthe mold members 4 to the position indicated in F igure 6, at which timethe carrier plate 29 may be withdrawn longitudinally from beneath themold. The carrier plate 29 is moved along the rollers 27 until the endof plates engages the stop 40 (Figure l) at which time the side plates35 and 36 carrying the halves of the mold may be brought together overthe core, thus forming the completed mold. The machine is now ready foranother operation, in which the steps are the same as above indicated.

Having thus described my invention and illustrated its use, what I claimas new and desire to secure by Letters Patent, is the fol lowing:

1. In combination, relatively movable molding members, a fluid-operatedram comprising a piston and cylinder having one of such parts secured toone molding member, a

crank on the other of the parts of the ram and a connection between thecrank and other molding member.

2. In combination, a pair of relatively movable molding members and afluid-operated ram mounted adjacent one member, one of the parts of suchram having connection to one member and the other part of the ram to theother member, and one of such connec-' opening of the molding members,and means for opening the molding members to such an extent as to permitof the removal of the mold on the carrier plate.

4. In combination, a pair of relatively movable molding members, acarrier late beneath the molding members, a trac on which the carrierplate is mounted for movement longitudinally of the line of opening ofthe molding members, and means for opening the molding members to suchan extent as to permit of the removal of'the mold on the carrier plate.

' 5. In combination in a core molding machine, relatively movablesectional molding members, oppositely projecting overlapping memberssecured to the bottom of such sectional mold members extending out pastthe lower edges of the molds and adapted to prevent the passage of sandwhen the mold is open and being filled, a core carrier and means forremoving such carrier longitudinally of the line of opening of themolding members. 4,

6. In combination in a core molding machine, relatively movablesectional molding members, a projecting plate secured to the bottom ofone member and extending beneath the bottom of the opposite member toprevent the loss of sand when the mold is open and being filled, a corecarrier, and means for removing such carrier longitudinally of the lineof opening of the molding members.

7. In combination, relatively movable molding members, power means formoving them together, yielding means normally tending to separate themolding members and comprising a supported shaft having secured theretoa pair of projecting operating levers, a link connecting each moldingmember to one of the operating levers and a counterweighted lever foroperating the shaft.

8. In combination in a core molding machine a mold divided intorelatively movable sections along a vertical plane and a plate securedto the bottom'of one of the sections and adapted to overlap the jointbetween the two members when the mold is closed.

In testimony whereof I have hereunto signed my name in the presence ofthe two subscribed witnesses.

WILLIAM W. DOOLITTLE.

Witnesses:

PAUL CARPENTER, JAMES NroHoLAs LORENZ.

